Die for collar pressing machines



Nov. 19, 1940. s, STABU@v 2,222,447

DIE FOR COLLAR PRESSING MACHINES` Filed June 1'7, 1940 U' V228? H, V' H l2 nl n y m Pi G. 5' 3 /23 243 S75/DHBV STA DUB INVENTOR.

' ATTORNEY Patented Nov. 19, 1940 UNITED STATES Aralar rice l 9 Claims.

My invention relates to dies for collar pressing machines and has particular reference to dies for pressing collar points with the application of heat.

In my Patent No. 2,141,051 I described a machine for pressing collars employing a die, in which collars of a predetermined shape can be pressed by means of a pressing block sliding between walls, strictly dening the predetermined shape of a collar. I have found, however, that such a die has a disadvantage in that it is limited to exact dimensions and shape of a particular collar, while in practice it is impossible to obtain collars without any slight variations in shape. Certain collars therefore become wedged too tightly between the sides of the block, while others, being too small for the die, will not have a smooth edge.

My present invention has for its object, therefore, to provide a die which can vbe used for pressing collars, not only at their sides, but also at their edges, even if they vary more or less in their shape. The collars, therefore, are not all pressed to a predetermined shape, but to the shapes which give the best contours. I have found that with the ordinary dies, such as disclosed in my foregoing application, the edges are not properly shaped unless the collar has exactly the same dimensions as the die. In my present invention I employ yieldably adjustable walls on the base block, so that the edges of the collars can be accurately shaped without, however, limiting them to any particular predetermined shape. I allow such a freedom of adjustment by 35 providing an upper pressing block which is not conned to the space between the side walls like in the ordinary dies, but which exerts its pressure on top of the side walls, the latter being yieldably movable. The side walls and the base therefore automatically adjust themselves to the shape of a particular collar.

Another object of my invention is to provide means to press the collars edgewise, which is 45 especially important for obtaining a smooth straight edge and point for the collars. This is also accomplished by making the die portions automatically and yieldably adjustable, rotating around the point of the collar so that the point and the edges are compressed edgewise in addition to the collar being compressed flat between the lower and upper blocks.

My invention is more fully described in the accompanying specification and drawing, in which:

Fig. 1 is an elevational view of my die with a collar ready to be pressed;

Fig. 2 is a similar view of the die with the collar compressed;

Fig. 3 is a top plan view of the die Fig. 4 is a top plan view of a modied die; and

Fig. 5 is a detail view of modied collar supporting blocks.

My collar pressing die consists of a base plate I having an electric or other suitable heater 2 10 inside. Two collar supporting blocks 3 are placed on the plate i and can slide toward each other, being normally separated by a spring ll. Collar guiding blocks 5 are placed at the sides of the blocks 3. The supporting blocks 3 are of a tri- 15 angular shape for supporting the end of a collar (i. The guiding blocks are joined together by a pivot l placed at the ends of the triangular supporting blocks 3. A spring 8 holds the blocks together at the pin l. A thin steel plate 9 is 20 placed on top of the blocks 3 and has its edges leveled toward the surface of the blocks so as to avoid any sharp corners which may show on the collar. The plate Q is somewhat more narrow than the collar, so that collars of varying width 25 can be pressed in the die. A pressing block it y is mounted on rods H extending through the plate l to the foot of a table (not shown) which supports the plate. The lower ends of the rods are attached to a bar l2 connected by a link I3 30 with a pedal lli. By depressing the pedal the block ill can be brought down against the guiding blocks 5, depressing them until the block lil cornes to rest against the collar E, compressing the same. Retrieving springs l5 are mounted 35 on the rods il, their lower ends resting on levers i6. The latter are pivoted at il', the free ends bearing against the sides of the guiding blocks 5. Rollers i8 are provided at the ends of the levers for reducing friction. The springs l5 are considerably stronger than the spring d, so that the latter is readily compressed, allowing the supporting blocks 3 to move toward each other, when the levers ES are depressed by the pressure from the springs i5. By depressing the pedal ill 45 the flat sides of the collar 6 are compressed and simultaneously its edges are compressed and straightened under pressure from the guiding blocks 5, moved together by the levers l5. The final position of the blocks 3 and 5 is determined 50 by the width of the collar, or the angle between its edges.

It is evident, therefore, that collars of different shapes can be pressed in my die, the blocks automatically adjusting themselves to the width of 55' the collar. My die has also an advantage in that it compresses the collar, including its point, edgewise, thereby forming smooth, straight edges and a sharp point. A desired degree of compression for the point of the collar may be obtained by so positioning the pivot 1 as to cause the blocks 5 to draw together at that point.

The die can be also constructed for pressing collars with rounded ends, as shown in Fig. 4. The supporting blocks i9 are provided with a thin plate 20 slightly narrower than the blocks, the Iguiding blocks 2l being pivoted together at 22. The collar supporting plate covers the slot between the blocks 3 or I9, thereby insuring a smooth surface for the collar. The plate 24 (Fig. 5) may be permanently attached to one of the blocks 3 by screws 23.

The guiding blocks are normally kept at an elevation above the plate l. They are provided, for this purpose, with plungers 25 resting on the plate i and sliding in corresponding holes in the blocks with springs 26. The blocks 5 move downward under pressure from the block l0, p-ermitting the latter to compress the collar while they are also moved together by the levers I6, the plungers 25 sliding over the plate l.

The collar 5 may be for convenience mounted on a thin supporting plate 21. The blocks 5 may be provided with lugs 28 for retaining the inner supporting blocks 3.

It is understood that my die for collar pressing machines may be further modied without departing from the spirit of the invention, as set forth in the appended claims.

I claim as my invention:

l. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks on the plate hingedly joined together at their'ends so as to form a triangular' space therebetween, means to yieldably and slidably support the blocks on the plate, triangular collar supporting blocks slidably supported on the plate between the guiding blocks, means to yieldably urge the supporting blocks apart against the inner walls of the guiding blocks, the .supporting blocks being adapted to support a collar, a press- 1 nsl ing block, means to move the pressing block downward against the guiding blocks, thereby depressing the same until the pressing `block comes to rest against the collar on the supporting blocks, and means to draw the guiding blocks together, thereby moving the supporting blocks together until the sides of the guiding blocks press against the edges 0f the collar.

2. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks on the plate hingedly joined together at their ends so as to form a triangular space therebetween, means to yieldably and slidably support the blocks on the plate, triangular co1- lar supporting blocks slidably supported on the plate between the guiding blocks, means to yieldably urge the supporting :blocks apart against the inner walls of the guiding blocks, the supporting blocks being adapted to support a collar, a pressing block, means to move the pressing block downward against the guiding blocks, thereby depressing the same until the pressing block comes to rest against the collar on the supporting blocks, means to draw the guiding blocks together, thereby moving the supporting blocks together until the sides of the guiding blocks press against the edges of the collar, and a thin metal plate slidably supported on the supporting blocks under the collar, closing the space between the supporting blocks.

3. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks on the plate hingedly joined together at their ends so as to form a triangular space therebetween, means to yieldably and slidably support the blocks on the plate, triangular Collar supporting blocks slidably supported on the plate between'the guiding blocks, means to yieldably urge the supporting blocks apart against the inner walls of the guiding blocks, the supporting blocks being adapted to support a collar, a pressing block, means to move the pressing block downward against the guiding blocks, thereby'depressing the same until the pressing block comes to rest against the collar on the supporting blocks, means to draw the guiding blocks together, thereby moving the supporting blocks together until the sides of the guiding blocks press against the edges of the collar, and a thin metal plate slidably supported on the supporting blocks under the collar, closing the space between the supporting blocks, the edges of the plate being beveled toward the surface of the supporting blocks.

4. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks on the plate hingedly joined together at their ends so as to form a triangular space therebetween, means to yieldably and slidably support the blocks on the plate, triangular collar supporting blocks slidably supported on the plate between the guiding blocks, springs urging the supporting blocks apart against the inner walls of the guiding blocks, the supporting blocks being adapted to support a collar, a pressing block, means to move the pressing block downward against the guiding blocks, thereby depressing the same until the pressing block comes to rest against the collar on the supporting blocks, and means to draw the guiding blocks together, thereby moving the supporting blocks together until the sides 0f the guiding blocks press against the edges of the collar.

5. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks, and means to draw the guiding blocks at their ends` so as t0 form a triangular space therebetween, springs slidably supporting the blocks on the plate, triangular collar supporting blocks slidably supported 0n the plate between the guiding blocks, means to yieldably urge the supporting blocks apart against the inner walls of the guiding blocks, the supporting blocks being adapted to support a collar, a pressing block, means to move the pressing block downwardagainst the guiding blocks, thereby depressing the same until the pressing block comes to rest against the collar on the -supporting blocks, and means to draw the guiding blocksv together, thereby moving the supporting blocks together until the sides of the guiding blocks press against the edges of the collar. y j

6. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks on the plate hingedly joined together at their ends so as to form a triangular space therebetween, means to yieldably and slidably support the blocks on the plate, triangular collar supporting blocks slidably supported on the plate ybetween they guiding blocks, means to yieldably urge the supporting blocks apart against the inner walls of the guiding blocks, the supporting blocks being adapted to support a collar, a pressing block', means to move the pressing block downward against the guiding blocks, thereby depressing the same until the pressing block comes to rest against the collar on the supporting blocks, levers rotatively supported on the plate and engaging the outer portions of the guiding blocks, and yieldable means to press the levers downward by the pressing block, thereby moving the guiding blocks together when the pressing block is moved downward.

7. A die for pressing collars comprising a base plate, means to heat the base plate, collar guiding blocks on the plate hingedIy joined together at their ends so as to form a triangular space therebetween, means to yieldably and slidably support the blocks on the plate, triangular collar1 supporting blocks slidably supported on the plate between the guiding lblocks, means to yieldably urge the supporting blocks apart against the inner walls of the guiding blocks, the supporting blocks being adapted to support a collar, a pressing block, means to move the pressing block downward against the guiding blocks, thereby depressing the same until the pressing block comes to rest against the collar on the supporting blocks, and yieldable means to draw the guiding blocks together when the pressing block is moved downward, thereby compressing the collar atwise and edgewise.

8. A die for pressing collars comprising a base plate, collar guiding blocks on the base forming a space therebetween corresponding to the contour of a collar to be pressed, means t slidably and yieldably support the blocks above the plate, collar supporting blocks slidably supported on the plate between the guiding blocks, means to resiliently urge the supporting blocks apart against the guiding blocks, a thin metal plate on the supporting blocks for supporting the collar, a pressing block movably supported above the guiding blocks, means to move the pressing block against the guiding blocks, thereby depressing the latter and compressing the collar, and meansv to move the guiding lblocks toward each other for compressing the edges of the collar.

9. A die for pressing collars comprising a base plate, collar guiding blocks on the base forming a space therebetween corresponding to the contour of a. collar to be pressed, means to slidably and yieldably support the blocks above the plate, collar supporting blocks slidably supported on the plate between the guiding blocks, means to resiliently urge the supporting blocks apart against the guiding blocks, means to support 'a collar on the supporting blocks, a pressing block movably supported above the guiding iblocks, means to move the pressing block against the guiding blocks, thereby depressing the latter and compressing the collar, and means to move the guiding blocks toward each other for compressing the edges of the collar.

STEPHEN STADUB. 

